package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    public EduSubjectService subjectService;


    public SubjectExcelListener() {    }

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    //读取excel内容，一行一行进行读取
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
      if(subjectData ==null){
          throw new GuliException(20001,"文件数据为空");
      }
      //一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
       //先判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if(existOneSubject==null){ //没有相同一级分类，进行添加
           existOneSubject=new EduSubject();
           existOneSubject.setParentId("0");
           existOneSubject.setTitle(subjectData.getOneSubjectName());  //一级分类名称
         subjectService.save(existOneSubject);
        }

        //获取一级分类的id值
        String pid=existOneSubject.getId();
        //添加二级分类
        //判断二级分类是否重复
        EduSubject existTwoSubject=this.existTwoSubject(subjectService,subjectData.getTwoSubjectName(),pid);
        if(existTwoSubject==null){
            existTwoSubject=new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());  //二级分类名称
            subjectService.save(existTwoSubject);
        }


    }

    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject=subjectService.getOne(wrapper);
        return oneSubject;
    }

    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","pid");
        EduSubject towSubject=subjectService.getOne(wrapper);
        return towSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
